Collection
- Institute for the History of Technology and Industrial Archaeology Records6
- International Association for Identification Records1
- Ira E. Robinson Papers1
- Irvine-Saunders Family Papers 1745-1910 Inclusive9
- Isaac Ambler Papers1
- Isaac Bird correspondence1
- Isaac Caruthers, Monroe County Merchant, Store and Tavern Ledgers1
- Isaac Horne Ledgers2
- Isaac Schofield Collection 1798-18321
- Isabella Furnace Account Book (Page County, Va.)2